Model for batch-to-glass conversion: coupling the heat transfer with conversion kinetics
This study describes the batch-to-glass conversion model for a container glass melting furnace. The model accounts for the relationship between the temperature history of the batch particles, batch properties, and the rate of melting by coupling the heat transfer and batch conversion kinetics models. The heat transfer within the batch is modeled by a spatially one-dimensional, convective-conductive heat balance, while the conversion kinetics is described using stretched exponential, differential Avrami, and Šesták–Berggren models based on silica dissolution data.
Spolupracující subjekt: VŠCHT Praha, Pacific Northwest National Laboratory (USA), U.S. Department of Energy (USA)
Publication: Ferkl, P., Hrma, P., Kloužek, J., Vernerová, M., Kruger, A.A., Pokorný, R.: Model for batch-to-glass conversion: coupling the heat transfer with conversion kinetics. Journal of Asian Ceramic Societies 9, 652-664 (2021). doi: doi.org/10.1111/jace.17406
 Scheme of the floating batch structure in fossil-fuel fired furnaces, the top surface is inclined, and the material is continuously removed by ablation. The red dashed line illustrates an approximate temperature profile, T; Q is the heat flux and L is the reaction zone thickness. Subscripts S, R, B, T, FO, and MB correspond to the core zone, core zone-reaction zone interface, batch bottom, batch top, foam onset, and bulk meltA comprehensive study of Power-to-Gas technology: Technical implementations overview, economic assessments, methanation plant as auxiliary operation of lignite-fired power station
This work is focused on the evaluation of technical implementations and related techno-economic aspects, the usability of CO2 sources, and possibility of mass deployment of Power-to-Gas technology (P-t-G), with energy storage being the primary objective. For P-t-G, to ensure a low price of surplus electricity is quite necessary. A possible way is to eliminate the regulated electricity distribution fees by associating a methanation plant with the main CO2-producing plant. The methanation plant will then be an auxiliary plant (auxiliary operation) with its own technological consumption and will be exempt from fees. Further, because attractiveness and competitiveness of P-t-G depends on interconnectedness with other technologies, the use of P-t-G as an auxiliary operation of lignite-fired station with nominal capacity of 110 MWhel was evaluated. As a result, the discounted payback period 3.8 (for a discount rate 8%) or 5.1 (for a discount rate 15%) years was calculated. These and other indicators show that the lignite-fired power plant's investment in P-t-G can have a good return.
Publication Straka Pavel: A comprehensive study of Power-to-Gas technology: Technical implementations overview, economic assessments, methanation plant as auxiliary operation of lignite-fired power station. Journal of Cleaner Production 311, 2021, 127642. doi: doi.org/10.1016/j.jclepro.2021.127642
 CO2 concentration in the flue gas or gas stream or off-gas from different processes. Pressure of gas 1 bar, for blast furnace gas 2–3 bar.
Further important publications and outputs
1. Kloužek J., Cincibusová P., Vernerová M., Hrma P., Marcial J., Pokorný R. (2021): Visual observation of foaming at the batch-melt interface during melting of soda-lime-silica glass. Ceramics-Silikaty 65 (4), 410-416.
doi.org/10.13168/cs.2021.0044(RVO 67985891)
2. Kolářová M., Kloužková A., Stodolová K., Kloužek J., Dvořáková P., Kohoutková M. (2021): Interaction of historical lead glazes with corrosive media. Ceramics-Silikaty 65 (4), 417-426. doi.org/10.13168/cs.2021.0045(RVO 67985891)
3. Cincibusová P., Jebavá M.,Tonarová V., Němec L. (2022): Impact of melt flow on the process of glass melting. Journal of Asian Ceramic Societies. 10 (3), 621-637.doi.org/10.1080/21870764.2022.2099102 (TH02020316, RVO 67985891)
4. Yatskiv R., Kostka P., Grym J., Zavadil J. (2022): Temperature sensing down to 4 K with erbium doped tellurite glasses. Journal of Non-Crystalline Solids. 575 (1 January 2022), 121183. doi.org/10.1016/j.jnoncrysol.2021.121183(GAČR 19-07456S)
5. Marcial J., Kloužek J., Vernerová M., Ferkl P., Lee S., Cutforth D., Hrma P., Kruger A., Pokorný R. (2022): Effect of Al and Fe sources on conversion of high-level nuclear waste feed to glass. Journal of Nuclear Materials. 559 (February 2022), 153423. doi.org/10.1016/j.jnucmat.2021.153423(RVO 67985891)
6. Marcial J., Luksic S., Kloužek J., Vernerová M., Cutforth D., Varga T., Hrma P., Kruger A., Pokorný R. (2022): In-situ x-ray and visual observation of foam morphology and behavior at the batch-melt interface during melting of simulated waste glass. Ceramics International. 48 (6), 7975-7985. doi.org/10.1016/j.ceramint.2021.11.344(RVO 67985891)
7. Marcial J., George J., Ferkl P., Pokorný R., Kissinger R., Crum J., Kloužek J., Hrma P., Kruger A., (2022): Elemental mapping and iron oxidation state measurement of synthetic low-activity waste feeds. Journal of Non-Crystalline Solids. 591 (1 September 2022), 121725. doi.org/10.1016/j.jnoncrysol.2022.121725
(RVO 67985891)
8. Rigby J., Dixon D., Cutforth D., Marcial J., Kloužek J., Pokorný R., Kruger A., Scrimshire A., Bell M., Bingham P. (2022): Melting behaviour of simulated radioactive waste as functions of different redox iron-bearing raw materials. Journal of Nuclear Materials. 569 (October 2022), 153946. doi.org/10.1016/j.jnucmat.2022.153946
(RVO 67985891)
9. Lee S., Jin T., Rivers E., Kloužek J., Luksic S., Marcial J., George J., Dixon D., Eaton W., Kruger A. (2022): Effect of sucrose on technetium and rhenium retention during vitrification of Low-activity wastes. Journal of the American Ceramic Society. 105 (12), 7321-7333. doi.org/10.1111/jace.18701(RVO 67985891)
10. Marcial J., Cicconi M., Pearce C., Kloužek J., Neeway J., Pokorný R., Vernerová M., McCloy J., Nienhuis E., Sjoblom R., Weaver J., Hand R., Hrma P., Neuville D., Kruger A. (2022): Effect of network connectivity on behavior of synthetic Broborg Hillfort glasses. Journal of the American Ceramic Society. xxx, xxx-xxx.doi.org/10.1111/jace.18778 (accepted)(RVO 67985891)
11. Ferkl P., Hrma P., Abboud A., Guillen D., Vernerová M., Kloužek J., Hall M., Kruger A., Pokorný R. (2022): Conversion degree and heat transfer in the cold cap and their effect on glass production rate in an electric melter. International Journal of Applied Glass Science xxx, xxx-xxx. doi.org/10.1111/ijag.16615(accepted)(RVO 67985891)
12. Novotná M., Knotek P., Hanzlíček T., Kutálek P., Perná I., Melánová K., Černošková E., Kopecká K. (2021): TiO2 Modified Geopolymers for the Photocatalytic Dye Decomposition. Crystals 11(12), 1511.https://doi.org/10.3390/cryst11121511
13. Straka P., Bičáková O., Hlinčík T. (2021): A Comparison of the Efficiency of Catalysts Based on Ni, Ni-Co and Ni-Mo in Pressure Pyrolysis of Biomass Leading to Hythane. Catalysts 11, 1480. doi.org/10.3390/catal11121480
14. Straka P., Bičáková O., Šupová M. (2022): Slow pyrolysis of waste polyethylene terephthalate yielding paraldehyde, ethylene glycol, benzoic acid and clean fuel. Polymer Degradation and Stability 198, 109900. doi.org/10.1016/j.polymdegradstab.2022.109900
15. Novotná M., Polonská A., Šídlová M., Perná I. (2021): Geopolymers: The influence of alkaline activator cations on efflorescence. Proceedings of the 8th International Conference on Chemical Technology, Prague, 326-331. ISBN 978-80-88307-08-2.
https://www.icct.cz/cs/Amca-ICCT/media/content/2021/proceedings/ICCT2021-Proceedings.pdf
Patent, Utility Model, Verified Technology, Software
16. Němec, L., Jebavá M., Cincibusová P., Budík P., Tonarová V.: Glasschmelzofen. Německý užitný vzor č. DE 20 2021 106 406 U1 (17.05.2022).(RVO 67985891)
 List of publications in 2022
List of publications in 2021 v pdf
List of publications in 2020
Further publications in ASEPu database
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